Devoutly (3743) (hosíōs from hósios = sacred, holy) means sacredly or marked by a conscientious regard for divine law in a way pleasing to God, in a holy manner. It means to carefully fulfill the duties God gives to a person. Hosios points to an inner disposition that gives regard to the sanctities of life. Hosios is an adverb which is marked by a conscientious regard for divine law so that one behaves in a way pleasing to God or in a holy manner. This is the only use of hosios in the NT and there is only one use in the Septuagint (LXX) ... 1 Kings 8:61 "Let your heart therefore be wholly devoted to the LORD our God, to walk (LXX= walk also holy {hosios}) in His statutes and to keep His commandments, as at this day. (Comment: Solomon prayed for the people what he should have prayed for himself!) Vine says hosios... is that quality of holiness which is manifested in those who have regard equally to grace and truth; it involves a right relation to God; TDNT says... A first reference of these terms is to actions that are regarded as sacred, lawful, or dutiful, i.e., good from the standpoint of morality and religion, no matter whether they are based on divine precept, natural law, ancient custom, or inner disposition. When combined with díkaios, what is indicated is that which corresponds to both divine and human law. (Kittel, G., Friedrich, G., & Bromiley, G. W. Theological Dictionary of the New Testament. Eerdmans)